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It can be used to stress HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP and Jabber/XMPP servers. Tsung is a free software released under the GPLv2 license.The purpose of Tsung is to simulate users in order to test the scalability and performance of IP based client/server applications. You can use it to do load and stress testing of your servers. Many protocols have been implemented and tested, and it can be easily extended.It can be distributed on several client machines and is able to simulate hundreds of thousands of virtual users concurrently (or even millions if you have enough hardware ...).

Main features

High Performance: the load can be distributed on a cluster of client machines
Multi-protocols using a plugin system: HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP and XMPP/Jabber are currently supported. SSL is also supported.
Several IP addresses can be used on a single machine using the underlying OS IP Aliasing
OS monitoring (CPU, memory and network traffic) using SNMP, Munin or Erlang agents on remote servers.
XML configuration system; several sessions can be used to simulate different type of users. Dynamic sessions can be easily described in XML (this can be used to retrieve at runtime an ID from the server output and use it later in the session).
In order to generate a realistic traffic, user think-times and the arrival rate can be randomize using a probability distribution
HTML reports can be generated during the load to view response times measurement, server CPU, etc.

HTTP

HTTP/1.0 and HTTP/1.1 support
GET and POST requests
Cookies are automatically handled
‘GET If-modified since' type of request
WWW-authentication Basic
Proxy mode to record sessions using a Web browser.
Basic support for SOAP using the HTTP mode (the SOAPAction HTTP header is handle).
WebDAV extensions

XMPP (Jabber)

Authentication, presence and register messages
Chat messages to online or offline users
Roster set and get requests
Global users' synchronization can be set on specific actions
PubSub, MUC, Virtual Hosts

Hello. I am very new to load testing. I want to do Performance Analysis of a messaging server for an enterprise application which uses XMPP. I want to test the performance during login, chat sessions, presence service notifications, etc., when under load. Tsung seems to be an apt tool for my requirements.

I am not able to completely analyse the results (both graphical and statistical) that I have obtained. I have referred the Tsung documentation and other websites. But I still have few queries. Could someone please help me with this??

Here are log details from ‘connect.txt’. This load is generated for max 100 users with arrivalphase of 1min and interarrival of 0.5second.

1) What is count exactly? I can tell that (using globalcount) from 0-10 sec 13 users were connected. From 10-20 sec 23 more users were connected. But what is count representing?
2) mean is calculated every 10 sec. But what is globalmean? How is it calculated?
3) max and min are representing maximum and minimum of what ?
4) How is Mean Rate calculated in Main Statistics table?
5) As per the log file, lowest 10sec mean must be 0.81. But why is it 0.97msec in Main Statistics table?